There is only so much SD-WAN vendors can do when it comes to VoIP and specifically WebRTC optimization. When a vendor claims for specific VoIP optimization that is based on quality of experience or similar considerations, I suggest to check the details of how this optimization is implemented and which applications it covers.
Delivery of WebRTC based communications services to the enterprise can be (and is today) done over best effort open internet but for higher adoption rates among enterprises it is required to enable the delivery of such services over managed networks.
The growing adoption of SD-WAN allows for agile and dynamic delivery of WebRTC services to enterprises
Although Cisco has a very strong position in the UC market, its strengths are mainly in UC of the past (on-premises deployments and telephony focused).
The acquisition of Broadsoft will help Cisco to better compete in the next generation cloud UC and team collaboration.
Overall a strong move of Cisco to help it compete with its rivals such as Microsoft and Slack.
MPLS is still pretty commonly used by enterprises, some use it for specific applications while others take it to the extreme and route all traffic of their branches to s central location. Service providers hit a jackpot with MPLS but this is now changing. 2 major forces are making MPLS less lucrative and eventually will kill it: MPLS price is going down; Enterprise requirements have changed
SD-WAN strengthens the position of OTT hosted UC providers vs. the incumbent operators as it makes the operators’ advantage of owning the network less valuable. SD-WAN reduced the operational cost associated with providing hosted UC in high quality as it removes the need for MPLS. Combined with WebRTC, adding real-time communications as a feature to existing SaaS applications has never been easier.
MPLS and DIA are built for the past and don’t support cost and technical requirements of the modern enterprise. SD-WAN will be like the Firewall is today for enterprises. It will become common among enterprises. It doesn’t mean MPLS will go away, but with the capability of Hybrid WAN as part of SD-WAN, MPLS will become less critical, less traffic will go over it,